Chipper spout



y 1933- s. D. PAYZER 1,906,486

CHIPPER SPOUT Filed Feb. 8, 1932 "w Z4 27 A Patented May 2, 1933 UNITEDSTATES PATENT OFFICE.

STANLEY D. PAYZER, OF WAUSAU, WISCONSIN, ASSIG-NOR TO I). J. MURRAYMANU- FACTURING 00., OF W'AUSA'U, WISCONSIN, A CORPORATION OF WISCONSINOHIPPER SPOUT Application filed February 8, 1932. Serial No. 591,629.

This invention relates to chipping machines used in the manufacture ofwood pulp for paper making, and is substantially like standard machinesofthis class, except for improvements in the means for securely clampingbed knives in place.

The objects of the invention are to provide an improved mounting forchipper spout bed knives whereby the knife may be securely held in itsadjusted position and yet rapidly removed and replaced without requiringstoppage of the machine for an undue length of time, as has beennecessary with chipping machines. A further object of the invention isto provide an improved means for clamping in a fixed position the bedknives of chipper spouts, which insures clamping contact substantiallythroughout the entire area of the knife and prevents destructivevibration of the knife such as necessitates frequent changing thereofdue to rapid dulling, and avoids the inferior product resulting from theuse of dull knives.

The objects of the invention are accomplished by means of a constructionsuch as illustrated in the drawing:

Figure 1 is aside view partly in section of a chipping machine havingthe improved knife-holding means j Fig. 2 is a side view of the spoutportion of the machine illustrating the manner in which theknife-holding wedge is shifted into and out of clamping relation withthe knife. c

Fig. 3 is a fragmentary detail showing a portion of the wedge in sectionand as having a guiding flange for fitting an inclined way, whereby thewedge is guided for direction of movement and is supported when indisengaged position.

The type of chipping machine to which this invention relates consistsessentially of a frame structure or bed, supporting, in inclinedposition, a spout into which logs are fed and bear endwise by gravityagainst a wheel rotating on a horizontal axis and having knives forpassing over the face of the spout, and which successively sheardiscshaped sections from the end of the log. The latter extends at anupward inclination of about 45 degrees from the face of the wheel. Theknives of the wheel cooperate with a fixed knife located at the bottomof the chipper spout. The mounting of these knives is vital to thesuccessful operation of the machine. Due to the heavy work performedthereby the bed knives should be clamped rigidly and be as free fromvibration as possible; otherwise an inferior prod uct results in whichthere is sawdust and splinters. Not only have the knives not beensatisfactorilymounted in machines of this type, but the manner ofmounting them and clamping them in position requires .an excessivestoppage of the machine and labor in the replacement and adjustment ofthe knives, H l In the improved machine the stationary knife of thechipper spout is clamped down upon the bed plate by a wedge which movesin a plane a few degrees inclined from the surface of the knife andbetween the knife and an inclined bearing surface above the wedge. Thestructure is heavy and rigid, and assures the clamping of the knifesubstantially throughout its area and close to the cutting edge.Provision is made for rapidly actuating the wedge in order to reduce thetime required for changing knives and thus encourages the more frequentchanging thereof, and improves the quality of the chips.

Referring to the drawing the base or frame structure 1 of the machinesupports atone end a chipper spout 2 and atthe opposite end a motor 3including a bearing 4, for a horizontal shaft 5, which is driven by themotor and carries a knife wheel 6. The opposite end of shaft 5 issupported by the part 7 of the base structure at one side of the chipperspout. The knives 8 of wheel 6 extend from near the axis of the Wheeltoward the periphery thereof sufficiently to span the mouth 9 of thechipper spout which is eccentric to the axis of the wheel, and inclinesupwardly about 45 degrees.

The chipper spout has the usual wear plates 10 and 11, and is providedwith a bed plate 12, resting upon and clamped to the part 7 of themachine frame. The lower wall 13 of the chipper spout terminates in theenlarged foot 14 bridged over the bed plate 12 at the location of thebed knife 15. The lower surface 16 of the foot of the spout is flat andsomewhat inclined from the horizontal to provide the upper bearingsurface for a wedge 17. This wedge has flanges 18 at its sides fittinggrooves 19, formed in the foot 14c of thespout. These grooves areparallel to the surface 16. The wedge is provided with rearwardlyextending cars 20 in which are supported fixed thereto pins 21 whichpass through forked ends of arms 22 carried by hori- 15 zontal shafts23, journaled in the side wall supports 24 for the chipper spout.

An operating lever 25, Figure 2, is carried by shaft 23 and by means ofthis lever the wedge may be withdrawn from the bed knife toallow'removal of the latter. In order to lock the lever 25 and to firmlydrive the wedge into knife-securing position the lever 25 carriespivoted thereto a forked arm 26 having the threaded end 27 passedthrough a notch 28 at the upper end of a fixed bracket 29. By tighteninga nut 30 the lever 25 may be drawn with considerable leveragerearwardly, thus forcing the wedge forwardly as far as it will go. Inorder to release the wedge it is only necessary to loosen nut 30, rockthe element 26 out of notch 28 and shift the lever 25 forwardly.

Adjustment of the bed knife 15 with reference to the knives'on wheel 6may be effected in the customary manner by rods 31 which, at their innerends 32, have T-heads fitting within T-slots in the knife, and at theiropposite ends pass through slots 33 in a transverse flange 34- extendingbetween the web-like extensions 24 of the side walls of the spout. Therods 31 are threaded at the end 35 to receive nuts 36 and 37 wherebythey may be finally adjusted fore and aft to properly seat the bed knife15. The cutting end 38 of the knife is sharpened at right angles to theplane of the knife in order that the latter will be reversible.

In the o eration of changing one of the knives 15, ever 25 is releasedby loosening nut 30, Fig. 2, the member 26 is swung upwardly and thelever is then manually shifted in a forward direct-ion thus withdrawingthe wedge 17 from the upper surface of knife 15. The wedge is guided inthis movement by the inclined grooves 19 within which the wedge flanges18 fit. The

wedge is thus retained out of contact with the knife. Nuts 36 and 37 areloosened and the rods 31 are swung upwardly clear of flange 34 whilebeing drawn rearwardly and pulling the knife out of the machine.

The new knife is then fitted to the T- heads of the rods 31 and pushedinto place and closely adjusted by manipulation of the nuts 36 and 37which finally serve to lock of this invention as defined by thefollowing claims.

I claim:

1. A chipping machine comprising a supporting structure having a rigidlymounted spout, a chipping wheel mounted for rotation upon the supportingstructure and provided with a chipping knife, means for driving saidchipping wheel, a stationary knife adjacent the end of the spout, asupport upon which the knife rests, means providing a wedge bearinghaving a surface opposite said knife support and inclined with referenceto the surface of-said knife support, and a wedge fittingv between saidbearlng surface and the knife and engaging the knife throughout themajor part of the surface of the knife with which it contacts.

2. A chipping machine comprising a supporting structure having a rigidlymounted spout, a chipping wheel mounted for rotation upon the supportingstructure and provided with a chipping knife, means for driving saidchipping wheel, a stationary knife adjacent theend of the spout, asupport upon which the knife rests, means providing a wedge bearinghaving a surface opposite said knife support andinclined with referenceto the surface of said knife support, a wedge fitting between saidbearing surface and the knife and engaging the knife throughout themajor part of the surface of the knife with which it contacts, and

means for adjusting and locking the wedge.

3. A chipping machine comprising a supporting structure having a rigidlymounted spout, a chipping wheel mounted for rotation upon the supportingstructure and provided with a chipping knife, means for driving saidchipping wheel, a stationary knife adjacent the end of the spout, asupport upon which the knife rests, means providing a wedge bearinghaving a surface opposite said knife support and inclined with referenceto the surface of said knife support, a wedge fitting between saidbearing surface and the knife and engaging the knife throughout themajor part of the surface of the knife with which it contacts, means foradjusting and locking the wedge, said means comprising a pivoted leverhaving at one end a pivotal connection with the wedge, an arm pivoted tosaid lever, a fixed bracket having an opening through which said armextends,

and threaded means for engaging said arm and the bracket for adjustingthe arm and lever.

4. A chipping machine comprising a supporting structure having a rigidlymounted I spout, a chipping Wheel mounted for rotation upon thesupporting structure and pro- Vided with a chipping knife, means fordriving said chipping wheel, a stationary knife adjacent the end of thespout, a support upon which the knife rests, means providing a wedgebearing having a surface opposite said knife support and inclined withreference to the surface of said knife support, a wedge fitting betweensaid bearing surface and the knife and engaging the knife throughout themajor part of the surface of the knife with which it contacts, andguiding means for the wedge arranged for guiding the wedge into and outof engagement with the knife and for supporting the wedge whendisengaged from the knife.

Signed at Wausau, in the county of Marathon and State of Wisconsin, this23rd day 25 of January, 1932.

STANLEY D. PAYZER.

